In a study relating to the labourers of a jute mill in a West Bengal, the following information was collected. "Twenty per cent of the total employees were females and forty per cent of them were married. Thirty female workers were not members of Trade Union. Compared to this, out of 600 male workers 500 were members of Trade Union and fifty per cent of the male workers were married. The unmarried non-member male employees were 60 which formed ten per cent of the total male employees. The unmarried non-members of the employees were 80". On the basis of this information, the ratio of married male non-members to the married female non-members is
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